25*42*9mm Deep Groove Ball Bearings 61905 ZZ/2RS/OPEN

Deep Groove Ball Bearings 61905 ZZ/2RS/OPEN

Dimension: 25*42*9mm

Once ordered, please inform me which type you need? open/2RS/ZZ/.... thanks.

Deep groove ball bearings (GB / T 276-2003) The original list of radial ball bearings is the most widely used rolling bearing. It is characterized by low frictional resistance and high speed. It can be used for mechanical parts that can bear radial load or combined load of radial and axial simultaneously. It can also be used for mechanical parts that bear axial load, such as small power motors, Automotive and tractor gearboxes, machine tool gearboxes, general machines, tools, etc.

Basic parameters

The basic deep groove ball bearing is composed of an outer ring, an inner ring, a group of steel balls and a group of retaining frames. There are two types of deep groove ball bearings: single row and double row. The deep groove ball structure is also divided into two types: sealed and open. The open type refers to the bearing without a seal structure. The sealed deep groove ball is divided into dust seal and oil proof seal. The material of the dustproof sealing cover is stamped from steel plate, which only serves to simply prevent dust from entering the bearing raceway. The oil-proof type is a contact oil seal, which can effectively prevent the grease in the bearing from overflowing.

Bearing structure

The deep groove ball bearing has a simple structure and is easy to achieve higher manufacturing accuracy than other types, so it is convenient for mass production in a series, the manufacturing cost is also low, and it is extremely popular. In addition to the basic type, deep groove ball bearings also have various modified structures, such as: deep groove ball bearings with dust covers, deep groove ball bearings with rubber seals, deep groove ball bearings with stop grooves, Deep groove ball bearing with large load capacity of ball notch, double row deep groove ball bearing.

Application

Deep groove ball bearings can be used in gearboxes, instruments, motors, household appliances, internal combustion engines, transportation vehicles, agricultural machinery, construction machinery, construction machinery, roller skates, yo-yo, etc.

Clearance:

The radial clearance of the bearing is divided into original clearance, installation clearance and working clearance. Generally, the original radial clearance of the bearing is larger than the clearance when the bearing is in operation. Clearance is an important technical parameter of bearings, which directly affects the technical performance of the bearings such as load distribution, vibration, noise, friction, service life and mechanical motion accuracy. Strictly speaking, the dynamic load rating of the bearing changes with the size of the clearance. The rated load (C and C0) listed in the product catalog is the load value when the working clearance is zero. If the clearance is too large, the bearing internal bearing area will be reduced, the stress on the rolling contact surface will be increased, the bearing's motion accuracy will be reduced, the vibration and noise will be increased, and the service life of the bearing will be shortened. It can even cause the bearing to "bite" during operation. Therefore, it is important to select different levels of bearing clearance according to the type of bearing and working conditions.